1 files changed, 97 insertions, 17 deletions

diff --git a/gdb/testsuite/gdb.base/sym-file-loader.c b/gdb/testsuite/gdb.base/sym-file-loader.c
index c30ffe1..d10065e 100644
--- a/gdb/testsuite/gdb.base/sym-file-loader.c
+++ b/gdb/testsuite/gdb.base/sym-file-loader.c
@@ -23,6 +23,59 @@
 
 #include "sym-file-loader.h"
 
+#include <inttypes.h>
+#include <ansidecl.h>
+#include <elf/common.h>
+#include <elf/external.h>
+
+#ifdef TARGET_LP64
+
+typedef Elf64_External_Phdr Elf_External_Phdr;
+typedef Elf64_External_Ehdr Elf_External_Ehdr;
+typedef Elf64_External_Shdr Elf_External_Shdr;
+typedef Elf64_External_Sym Elf_External_Sym;
+typedef uint64_t Elf_Addr;
+
+#elif defined TARGET_ILP32
+
+typedef Elf32_External_Phdr Elf_External_Phdr;
+typedef Elf32_External_Ehdr Elf_External_Ehdr;
+typedef Elf32_External_Shdr Elf_External_Shdr;
+typedef Elf32_External_Sym Elf_External_Sym;
+typedef uint32_t Elf_Addr;
+
+#endif
+
+#define GET(hdr, field) (\
+sizeof ((hdr)->field) == 1 ? (uint64_t) (hdr)->field[0] : \
+sizeof ((hdr)->field) == 2 ? (uint64_t) *(uint16_t *) (hdr)->field : \
+sizeof ((hdr)->field) == 4 ? (uint64_t) *(uint32_t *) (hdr)->field : \
+sizeof ((hdr)->field) == 8 ? *(uint64_t *) (hdr)->field : \
+*(uint64_t *) NULL)
+
+#define GETADDR(hdr, field) (\
+sizeof ((hdr)->field) == sizeof (Elf_Addr) ? *(Elf_Addr *) (hdr)->field : \
+*(Elf_Addr *) NULL)
+
+struct segment
+{
+  uint8_t *mapped_addr;
+  Elf_External_Phdr *phdr;
+  struct segment *next;
+};
+
+struct library
+{
+  int fd;
+  Elf_External_Ehdr *ehdr;
+  struct segment *segments;
+};
+
+static Elf_External_Shdr *find_shdr (Elf_External_Ehdr *ehdr,
+				     const char *section);
+static int translate_offset (uint64_t file_offset, struct segment *seg,
+			     void **addr);
+
 #ifdef TARGET_LP64
 
 uint8_t
@@ -123,10 +176,10 @@ get_origin (void)
 /* Mini shared library loader.  No reallocation
    is performed for the sake of simplicity.  */
 
-int
-load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
-	    struct segment **seg_out)
+struct library *
+load_shlib (const char *file)
 {
+  struct library *lib;
   uint64_t i;
   int fd = -1;
   off_t fsize;
@@ -148,7 +201,7 @@ load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
       if (origin == NULL)
 	{
 	  fprintf (stderr, "get_origin not implemented.");
-	  return -1;
+	  return NULL;
 	}
 
       path = alloca (strlen (origin) + 1 + strlen (file) + 1);
@@ -162,7 +215,7 @@ load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
   if (fd < 0)
     {
       perror ("fopen failed.");
-      return -1;
+      return NULL;
     }
 
   fsize = lseek (fd, 0, SEEK_END);
@@ -170,14 +223,14 @@ load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
   if (fsize < 0)
     {
       perror ("lseek failed.");
-      return -1;
+      return NULL;
     }
 
   addr = (uint8_t *) mmap (NULL, fsize, PROT_READ, MAP_PRIVATE, fd, 0);
   if (addr == (uint8_t *) -1)
     {
       perror ("mmap failed.");
-      return -1;
+      return NULL;
     }
 
   /* Check if the lib is an ELF file.  */
@@ -188,7 +241,7 @@ load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
       || ehdr->e_ident[EI_MAG3] != ELFMAG3)
     {
       printf ("Not an ELF file: %x\n", ehdr->e_ident[EI_MAG0]);
-      return -1;
+      return NULL;
     }
 
   if (ehdr->e_ident[EI_CLASS] == ELFCLASS32)
@@ -196,7 +249,7 @@ load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
       if (sizeof (void *) != 4)
 	{
 	  printf ("Architecture mismatch.");
-	  return -1;
+	  return NULL;
 	}
     }
   else if (ehdr->e_ident[EI_CLASS] == ELFCLASS64)
@@ -204,10 +257,19 @@ load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
       if (sizeof (void *) != 8)
 	{
 	  printf ("Architecture mismatch.");
-	  return -1;
+	  return NULL;
 	}
     }
 
+  lib = malloc (sizeof (struct library));
+  if (lib == NULL)
+    {
+      printf ("malloc failed.");
+      return NULL;
+    }
+
+  lib->fd = fd;
+
   /* Load the program segments.  For the sake of simplicity
      assume that no reallocation is needed.  */
   phdr = (Elf_External_Phdr *) (addr + GET (ehdr, e_phoff));
@@ -223,8 +285,25 @@ load_shlib (const char *file, Elf_External_Ehdr **ehdr_out,
 	    head_seg = next_seg;
 	}
     }
-  *ehdr_out = ehdr;
-  *seg_out = head_seg;
+  lib->ehdr = ehdr;
+  lib->segments = head_seg;
+  return lib;
+}
+
+int
+get_text_addr (struct library *lib, void **text_addr)
+{
+  Elf_External_Shdr *text;
+
+  /* Get the text section.  */
+  text = find_shdr (lib->ehdr, ".text");
+  if (text == NULL)
+    return -1;
+
+  if (translate_offset (GET (text, sh_offset), lib->segments, text_addr)
+      != 0)
+    return -1;
+
   return 0;
 }
 
@@ -289,7 +368,7 @@ find_strtab (Elf_External_Ehdr *ehdr,
 
 /* Return the section header named SECTION.  */
 
-Elf_External_Shdr *
+static Elf_External_Shdr *
 find_shdr (Elf_External_Ehdr *ehdr, const char *section)
 {
   uint64_t shstrtab_size = 0;
@@ -317,7 +396,7 @@ find_shdr (Elf_External_Ehdr *ehdr, const char *section)
 
 /* Return the symbol table.  */
 
-Elf_External_Sym *
+static Elf_External_Sym *
 find_symtab (Elf_External_Ehdr *ehdr, uint64_t *symtab_size)
 {
   uint64_t i;
@@ -337,7 +416,7 @@ find_symtab (Elf_External_Ehdr *ehdr, uint64_t *symtab_size)
 
 /* Translate a file offset to an address in a loaded segment.   */
 
-int
+static int
 translate_offset (uint64_t file_offset, struct segment *seg, void **addr)
 {
   while (seg)
@@ -369,14 +448,15 @@ translate_offset (uint64_t file_offset, struct segment *seg, void **addr)
 /* Lookup the address of FUNC.  */
 
 int
-lookup_function (const char *func,
-		 Elf_External_Ehdr *ehdr, struct segment *seg, void **addr)
+lookup_function (struct library *lib, const char *func, void **addr)
 {
   const char *strtab;
   uint64_t strtab_size = 0;
   Elf_External_Sym *symtab;
   uint64_t symtab_size = 0;
   uint64_t i;
+  Elf_External_Ehdr *ehdr = lib->ehdr;
+  struct segment *seg = lib->segments;
 
   /* Get the string table for the symbols.  */
   strtab = find_strtab (ehdr, ".strtab", &strtab_size);